Research On Energy Management Strategy Of Hybrid Electric Vehicle And Design Of Rapid Control Prototype System

As China completes the building of a moderately prosperous society in an all-round way,cars have now become an indispensable tool for people to travel.Hybrid vehicles have attracted wide attention in the automotive industry in recent years because of their low emissions and other characteristics.Hybrid electric vehicle has multiple power sources,and the energy management strategy is the core part of it.It needs to reasonably allocate the torque to improve the fuel economy of the vehicle and optimize the emission.Therefore,research on energy management strategy is an important link of hybrid electric vehicle.The rapid control prototype system is one of the important ways to verify the merits and demerits of energy management strategy.In order to better verify the effectiveness of the optimal energy management strategy,this paper focuses on completing the design of the prototype rapid control system while studying the energy management strategy.Firstly,the vehicle power model of the hybrid electric vehicle(HEV)is studied in Simulink,and the minimum energy management strategy of equivalent fuel consumption considering emissions is designed.Using NEDC and WLTC condition to test the control strategy,and then according to the results of optimized analysis,found himself design consider emissions by the equivalent fuel consumption minimum energy management strategy of energy management strategy than rule algorithm hundred kilometers fuel consumption is reduced,the pollutant emissions,in the aspect of energy conservation and emissions reduction effect is better,to reasonably the energy flow distribution,Achieve the goal of reducing fuel consumption and emissions.Secondly,the architecture of the rapid control prototype platform is studied,and the rapid control prototype system is built with the development board MPC5634 M as the core.The hardware of rapid control prototype system is selected,and some software of rapid control prototype system is developed.In order to facilitate the online code upgrade,the Bootloader program code based on CAN is designed.At the same time,according to the V development mode,I studied the automatic code generation technology,and used the MATLAB code generation tool to convert the strategy I designed into the controller code.In order to communicate smoothly with the whole fast control prototype system,the CAN communication port is designed by using IEEE 754 format in Simulink and SCM programs.Finally,the energy management strategy designed by myself CAN generate the controller code normally.After downloading to the SCM,the upper computer and the lower computer CAN conduct simulation through CAN communication,which verifies the reliability and accuracy of the energy management strategy.Finally,considering that the prototype rapid control system could not obtain and modify the parameters in the controller in time and effectively,the CCP protocol was studied,and a calibration system based on CCP protocol was developed for the development board MPC5634 M.During the experiment,the MCU can be normally connected with the calibration software,and the variables in the MCU can be monitored and calibrated in real time.The whole process is based on the development process of V mode,and the development of energy management strategy is highly efficient and standardized.It not only proves the advantages of the energy management strategy designed by me through the test results,but also proves in the process that the rapid control prototype designed by me can be conveniently used in actual development and testing.